Error Encountered with PowerDVD 11 BD

I recently upgraded to Power DVD 11 Ultra, but I'm suddenly getting the following error:
This content is only allowed on a digital output. Ensure your display device uses a DVI, HDMI, or Display Port connector. -(Code = 0121)
I used to have Power DVD 9 Ultra and I can play Blue-rays perfectly. Power DVD then informed me that there's an available update so I go right ahead to upgrade it (since I thought it's always better to have the latest version). But then it stopped working.
Is there anyone having the same issues?
Please help me fix it.
